Hello,Unfortunately, this is a monitor related issue. Laptops' displays does not support changing the contrast typically.I can make the refund if you want to. For this, request the refund in answer to the email with the license key.

alervd wrote:Hello,Unfortunately, this is a monitor related issue. Laptops' displays does not support changing the contrast typically.I can make the refund if you want to. For this, request the refund in answer to the email with the license key.